FCEP WP1 – All the rest…

Teemu SarjovaaraJingzhou YuMatteo ImperatoZaira KünschAntti Elonheimo

ÅA 11.12.2012

WP 1.2 Optical Measurements• Optical engine measurements by Elonheimo and

Hulkkonen• Gas jets with single hole nozzle by Jingzhou Yu

(Currently at Wärtsilä) • Gas jets with pintle nozzle by Zaira Künsch (ETH), on

going.

Internal Combustion

Engine Research Group

The New Optical Engine at Aalto University

• Based on domestic Agco Sisu Power 84 diesel engine

• Single cylinder• Max speed: 1500 RPM• Electro-hydraulic valve actuators

• Fully adjustable valve timings and lifts• External charge air compressor• Common rail injection• Optical access through piston top and cylinder

liner

Internal Combustion

Engine Research Group

Key components: Piston

Piston top (quartz)

Original piston

Piston extension (titanium)

Internal Combustion

Engine Research Group

The Optical Access

Mirror

Piston

Piston window

Cylinder windows (quartz)

Window ring

Camera

Internal Combustion

Engine Research Group

Experimental set-up at Aalto University

Liner

Piston Extension

45° Mirror

Protection Glass

Cylinder Head

Electro-Hydraulic

ValveActuator

CCD Camera

Mechanical Shutter

Common Rail

Internal Combustion

Engine Research Group

Miller tests

• Load: 50% (boundary conditions)• Speed: 800 rpm• Injection Timing: 1,2 bTDC• Injection Duration: 1 ms (~5 CAD)• Injection Pressure: 464 bar• Fuel: HVO (NExBTL)• Three intake valve timings: Normal, Miller

50, and Miller 80• CCD Camera: 1376×1040 Pixels• Imaging through glass piston top• Lighting with LEDs• Measurements: Spray penetration and

cone angle, and visible ignition

Internal Combustion

Engine Research Group

Pictures from the Miller tests (Normal timing)

Measurements by Yu

• PLIF method• Hoerbiger gas injector

– Single hole (0,5mm)

• Nitrogen acetone mixture

• Result will be presented in SAE WC 2013

Measurements by Künsch

• PLIF method• Pinttle nozzle

– Siemens pietzo injector for DI gasoline engines

• Nitrogen acetone mixture• Diploma Thesis • Will be finished early

2013

p_inj = 10 bar

p_inj = 20 bar

p_inj = 30 bar

2.0 ms 2.5 ms 3.5 ms

WP 1.3Extreme Value Research• Single cylinder turbo charging model development by

Jussi Nurmiranta (Currently at Wärtsilä)• Seizure with EVE engine in January 2012 (not FCEP

tests) suspended the engine running for whole spring 2012

• Engine was back in running condition in July 2012• FCEP test runs continued in November

– 300 bar injection parameter study (finished)– Pilot injection study (on-going)

Figure 6. The correlation between pulse factor (β) and pulse ratio (PR) with valve timing A

Figure 7. The correlation between pulse factor (β) and pulse ratio (PR) with valve timing B

Figure 1. Left: Measured exhaust gas pressure pulsation in the exhaust runners of SCE and MCE. Right: Simulated exhaust gas mass flows at the turbine entry position from SCE and MCE.